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[" 1.If "A=30^(@)" show that: "],[[" 0.3...

[" 1.If "A=30^(@)" show that: "],[[" 0.3065"," (a) "sin2A=2sin A cos A],[" (b) "cos3A=4cos^(3)A-3cos A]]

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If A = 30^(@) , show that : (i) (1 + sin 2A + cos 2A)/(sin A + cos A) = 2 cos A (ii) (cos^(3)A - cos 3A)/(cos A) + (sin^(3)A + sin 3A)/(sin A) = 3

If A=30^(@) , show that : (1+sin2A+cos2A)/(sinA+cosA)=2cosA .

If A=30^(@) , show that : (1+sin2A+cos2A)/(sinA+cosA)=2cosA .

If A=30^(@) , show that : cos2A=cos^(4)A-sin^(4)A

If A=30^(@) , show that : (sinA-cosA)^(2)=1-sin2A

If A=30^(@) , show that : (1-cos2A)/(sin2A)=tanA

If A=30 ^(@) then show that sin (A+ 30 ^(@) ) + cos (A+ 60 ^(@)) = cos A

If A =30^(@) ,then show that : tan2A=(2tanA)/(1-tan^(2)A)

If A =30^(@) ,then show that : tan2A=(2tanA)/(1-tan^(2)A)

If A=30^(@) , show that : sin3A=4sinAsin(60^(@)-A)sin(60^(@)+A)